./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:44:10,713 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:44:10,773 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:44:10,779 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:44:10,779 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:44:10,801 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:44:10,802 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:44:10,802 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:44:10,803 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:44:10,803 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:44:10,804 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:44:10,804 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:44:10,804 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:44:10,804 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:44:10,804 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:44:10,805 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:44:10,805 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:44:10,807 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:44:10,807 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:44:10,807 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:44:10,810 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:44:10,810 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:44:10,810 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:44:10,810 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:44:10,810 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:44:10,811 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:44:10,811 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:44:10,811 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:44:10,811 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:44:10,811 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:44:10,812 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:44:10,812 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:44:10,812 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:44:10,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:44:10,812 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:44:10,812 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:44:10,812 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:44:10,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:44:10,813 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:44:10,813 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:44:10,813 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:44:10,813 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:44:10,814 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a [2024-10-11 19:44:11,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:44:11,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:44:11,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:44:11,030 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:44:11,031 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:44:11,032 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i [2024-10-11 19:44:12,386 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:44:12,576 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:44:12,576 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i [2024-10-11 19:44:12,589 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/9c46c1e36/95c2e03254d74b9a9ed38b33972f825e/FLAG6fb69ed00 [2024-10-11 19:44:12,600 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/9c46c1e36/95c2e03254d74b9a9ed38b33972f825e [2024-10-11 19:44:12,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:44:12,603 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:44:12,608 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:44:12,608 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:44:12,616 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:44:12,617 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:44:12" (1/1) ... [2024-10-11 19:44:12,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b56911e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:12, skipping insertion in model container [2024-10-11 19:44:12,619 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:44:12" (1/1) ... [2024-10-11 19:44:12,668 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:44:13,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:44:13,361 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:44:13,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:44:13,465 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:44:13,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:13 WrapperNode [2024-10-11 19:44:13,466 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:44:13,467 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:44:13,467 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:44:13,468 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:44:13,474 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:13" (1/1) ... [2024-10-11 19:44:13,492 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:13" (1/1) ... [2024-10-11 19:44:13,515 INFO L138 Inliner]: procedures = 262, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2024-10-11 19:44:13,517 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:44:13,518 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:44:13,518 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:44:13,518 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:44:13,526 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:13" (1/1) ... [2024-10-11 19:44:13,527 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:13" (1/1) ... [2024-10-11 19:44:13,530 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:13" (1/1) ... [2024-10-11 19:44:13,552 INFO L175 MemorySlicer]: Split 7 memory accesses to 1 slices as follows [7]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 4 writes are split as follows [4]. [2024-10-11 19:44:13,554 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:13" (1/1) ... [2024-10-11 19:44:13,554 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:13" (1/1) ... [2024-10-11 19:44:13,562 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:13" (1/1) ... [2024-10-11 19:44:13,565 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:13" (1/1) ... [2024-10-11 19:44:13,570 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:13" (1/1) ... [2024-10-11 19:44:13,571 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:13" (1/1) ... [2024-10-11 19:44:13,577 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:44:13,578 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:44:13,580 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:44:13,580 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:44:13,580 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:13" (1/1) ... [2024-10-11 19:44:13,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:44:13,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:44:13,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:44:13,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:44:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 19:44:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 19:44:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 19:44:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 19:44:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:44:13,669 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-11 19:44:13,669 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-11 19:44:13,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:44:13,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:44:13,670 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:44:13,769 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:44:13,771 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:44:13,935 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:44:13,935 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:44:14,008 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:44:14,009 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 19:44:14,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:44:14 BoogieIcfgContainer [2024-10-11 19:44:14,009 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:44:14,011 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:44:14,011 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:44:14,013 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:44:14,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:44:12" (1/3) ... [2024-10-11 19:44:14,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216b254f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:44:14, skipping insertion in model container [2024-10-11 19:44:14,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:13" (2/3) ... [2024-10-11 19:44:14,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216b254f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:44:14, skipping insertion in model container [2024-10-11 19:44:14,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:44:14" (3/3) ... [2024-10-11 19:44:14,015 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_05-funloop_hard2.i [2024-10-11 19:44:14,028 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:44:14,028 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-10-11 19:44:14,028 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:44:14,058 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:44:14,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 43 transitions, 90 flow [2024-10-11 19:44:14,108 INFO L124 PetriNetUnfolderBase]: 3/42 cut-off events. [2024-10-11 19:44:14,108 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:44:14,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 42 events. 3/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 122 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2024-10-11 19:44:14,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 43 transitions, 90 flow [2024-10-11 19:44:14,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 42 transitions, 87 flow [2024-10-11 19:44:14,131 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:44:14,137 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5e2cfabe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:44:14,137 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-10-11 19:44:14,143 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:44:14,143 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2024-10-11 19:44:14,143 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:44:14,144 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:14,144 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:44:14,145 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:44:14,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:14,149 INFO L85 PathProgramCache]: Analyzing trace with hash -377893182, now seen corresponding path program 1 times [2024-10-11 19:44:14,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:14,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886851046] [2024-10-11 19:44:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:14,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:14,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:14,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886851046] [2024-10-11 19:44:14,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886851046] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:44:14,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:44:14,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:44:14,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758237886] [2024-10-11 19:44:14,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:44:14,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:44:14,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:14,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:44:14,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:44:14,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-10-11 19:44:14,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:14,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:14,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-10-11 19:44:14,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:14,515 INFO L124 PetriNetUnfolderBase]: 114/317 cut-off events. [2024-10-11 19:44:14,515 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:44:14,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 317 events. 114/317 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1617 event pairs, 91 based on Foata normal form. 0/260 useless extension candidates. Maximal degree in co-relation 536. Up to 229 conditions per place. [2024-10-11 19:44:14,519 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 25 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-10-11 19:44:14,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 143 flow [2024-10-11 19:44:14,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:44:14,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:44:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-10-11 19:44:14,530 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-10-11 19:44:14,531 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 87 flow. Second operand 3 states and 79 transitions. [2024-10-11 19:44:14,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 143 flow [2024-10-11 19:44:14,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:44:14,556 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 98 flow [2024-10-11 19:44:14,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-10-11 19:44:14,560 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2024-10-11 19:44:14,561 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 98 flow [2024-10-11 19:44:14,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:14,561 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:14,561 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:44:14,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 19:44:14,561 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:44:14,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:14,562 INFO L85 PathProgramCache]: Analyzing trace with hash 2129073418, now seen corresponding path program 1 times [2024-10-11 19:44:14,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:14,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8095292] [2024-10-11 19:44:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:14,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:14,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:14,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8095292] [2024-10-11 19:44:14,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8095292] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:44:14,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945807065] [2024-10-11 19:44:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:14,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:14,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:44:14,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:44:14,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 19:44:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:14,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:44:14,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:44:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:14,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:44:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:14,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945807065] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:44:14,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:44:14,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-10-11 19:44:14,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729706933] [2024-10-11 19:44:14,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:44:14,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 19:44:14,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:14,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 19:44:14,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-11 19:44:14,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-10-11 19:44:14,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:14,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:14,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-10-11 19:44:14,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:14,835 INFO L124 PetriNetUnfolderBase]: 114/320 cut-off events. [2024-10-11 19:44:14,836 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:44:14,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 320 events. 114/320 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1617 event pairs, 91 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 555. Up to 229 conditions per place. [2024-10-11 19:44:14,840 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 25 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2024-10-11 19:44:14,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 170 flow [2024-10-11 19:44:14,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:44:14,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:44:14,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-10-11 19:44:14,843 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5232558139534884 [2024-10-11 19:44:14,843 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 98 flow. Second operand 6 states and 135 transitions. [2024-10-11 19:44:14,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 170 flow [2024-10-11 19:44:14,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 166 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 19:44:14,846 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 130 flow [2024-10-11 19:44:14,847 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=130, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-10-11 19:44:14,848 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-10-11 19:44:14,848 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 130 flow [2024-10-11 19:44:14,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:14,849 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:14,849 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:44:14,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 19:44:15,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:15,050 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:44:15,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:15,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1098449124, now seen corresponding path program 2 times [2024-10-11 19:44:15,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:15,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397969816] [2024-10-11 19:44:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:15,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:15,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:15,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397969816] [2024-10-11 19:44:15,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397969816] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:44:15,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355706576] [2024-10-11 19:44:15,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:44:15,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:15,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:44:15,165 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:44:15,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 19:44:15,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 19:44:15,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:44:15,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 19:44:15,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:44:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 19:44:15,316 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:44:15,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355706576] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:44:15,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 19:44:15,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2024-10-11 19:44:15,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312842228] [2024-10-11 19:44:15,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:44:15,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:44:15,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:15,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:44:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:44:15,348 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-11 19:44:15,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:15,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:15,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-11 19:44:15,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:15,537 INFO L124 PetriNetUnfolderBase]: 226/559 cut-off events. [2024-10-11 19:44:15,538 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:44:15,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 559 events. 226/559 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2801 event pairs, 93 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 1009. Up to 288 conditions per place. [2024-10-11 19:44:15,541 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 62 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2024-10-11 19:44:15,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 78 transitions, 326 flow [2024-10-11 19:44:15,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:44:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:44:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-10-11 19:44:15,544 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6325581395348837 [2024-10-11 19:44:15,544 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 130 flow. Second operand 5 states and 136 transitions. [2024-10-11 19:44:15,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 78 transitions, 326 flow [2024-10-11 19:44:15,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 78 transitions, 312 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 19:44:15,547 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 138 flow [2024-10-11 19:44:15,548 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2024-10-11 19:44:15,548 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-10-11 19:44:15,549 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 138 flow [2024-10-11 19:44:15,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:15,550 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:15,550 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:44:15,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 19:44:15,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:15,755 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:44:15,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:15,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1098449123, now seen corresponding path program 1 times [2024-10-11 19:44:15,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:15,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646826089] [2024-10-11 19:44:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:15,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 19:44:15,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:15,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646826089] [2024-10-11 19:44:15,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646826089] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:44:15,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:44:15,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:44:15,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740675544] [2024-10-11 19:44:15,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:44:15,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:44:15,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:15,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:44:15,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:44:15,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-11 19:44:15,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:15,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:15,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-11 19:44:15,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:16,019 INFO L124 PetriNetUnfolderBase]: 198/477 cut-off events. [2024-10-11 19:44:16,020 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-10-11 19:44:16,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 477 events. 198/477 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2249 event pairs, 39 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 1011. Up to 280 conditions per place. [2024-10-11 19:44:16,022 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 41 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-10-11 19:44:16,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 250 flow [2024-10-11 19:44:16,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:44:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:44:16,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-10-11 19:44:16,026 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5697674418604651 [2024-10-11 19:44:16,026 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 138 flow. Second operand 4 states and 98 transitions. [2024-10-11 19:44:16,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 250 flow [2024-10-11 19:44:16,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:44:16,029 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 136 flow [2024-10-11 19:44:16,029 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-10-11 19:44:16,030 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-10-11 19:44:16,031 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 136 flow [2024-10-11 19:44:16,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:16,031 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:16,031 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:44:16,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 19:44:16,031 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:44:16,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1068697666, now seen corresponding path program 1 times [2024-10-11 19:44:16,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:16,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273645662] [2024-10-11 19:44:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:16,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 19:44:16,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:16,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273645662] [2024-10-11 19:44:16,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273645662] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:44:16,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:44:16,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:44:16,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776324336] [2024-10-11 19:44:16,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:44:16,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:44:16,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:16,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:44:16,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:44:16,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-11 19:44:16,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:16,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:16,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-11 19:44:16,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:16,260 INFO L124 PetriNetUnfolderBase]: 198/484 cut-off events. [2024-10-11 19:44:16,260 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2024-10-11 19:44:16,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 484 events. 198/484 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2339 event pairs, 104 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 1050. Up to 260 conditions per place. [2024-10-11 19:44:16,263 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 39 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2024-10-11 19:44:16,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 258 flow [2024-10-11 19:44:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:44:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:44:16,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-10-11 19:44:16,264 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-10-11 19:44:16,264 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 136 flow. Second operand 4 states and 88 transitions. [2024-10-11 19:44:16,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 258 flow [2024-10-11 19:44:16,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 240 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:44:16,266 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 128 flow [2024-10-11 19:44:16,266 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2024-10-11 19:44:16,267 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-10-11 19:44:16,267 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 128 flow [2024-10-11 19:44:16,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:16,267 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:16,267 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:44:16,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 19:44:16,268 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:44:16,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:16,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1068697667, now seen corresponding path program 1 times [2024-10-11 19:44:16,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:16,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002569515] [2024-10-11 19:44:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:16,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:16,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:16,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002569515] [2024-10-11 19:44:16,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002569515] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:44:16,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21297018] [2024-10-11 19:44:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:16,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:16,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:44:16,324 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:44:16,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 19:44:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:16,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 19:44:16,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:44:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:16,403 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:44:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:16,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21297018] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:44:16,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:44:16,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-10-11 19:44:16,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913674396] [2024-10-11 19:44:16,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:44:16,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 19:44:16,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:16,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 19:44:16,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-10-11 19:44:16,462 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-10-11 19:44:16,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 128 flow. Second operand has 12 states, 12 states have (on average 18.333333333333332) internal successors, (220), 12 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:16,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:16,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-10-11 19:44:16,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:16,594 INFO L124 PetriNetUnfolderBase]: 198/475 cut-off events. [2024-10-11 19:44:16,595 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-10-11 19:44:16,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 475 events. 198/475 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2129 event pairs, 169 based on Foata normal form. 6/465 useless extension candidates. Maximal degree in co-relation 1017. Up to 397 conditions per place. [2024-10-11 19:44:16,597 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 27 selfloop transitions, 11 changer transitions 0/46 dead transitions. [2024-10-11 19:44:16,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 46 transitions, 240 flow [2024-10-11 19:44:16,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:44:16,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:44:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-10-11 19:44:16,599 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-10-11 19:44:16,599 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 128 flow. Second operand 12 states and 246 transitions. [2024-10-11 19:44:16,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 46 transitions, 240 flow [2024-10-11 19:44:16,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 46 transitions, 234 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:44:16,602 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 206 flow [2024-10-11 19:44:16,602 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=206, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2024-10-11 19:44:16,604 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-10-11 19:44:16,604 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 206 flow [2024-10-11 19:44:16,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.333333333333332) internal successors, (220), 12 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:16,606 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:16,606 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:44:16,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 19:44:16,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:16,810 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:44:16,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:16,810 INFO L85 PathProgramCache]: Analyzing trace with hash -922978685, now seen corresponding path program 2 times [2024-10-11 19:44:16,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:16,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424115878] [2024-10-11 19:44:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:16,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:44:16,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:16,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424115878] [2024-10-11 19:44:16,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424115878] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:44:16,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:44:16,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:44:16,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019355646] [2024-10-11 19:44:16,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:44:16,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:44:16,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:16,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:44:16,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:44:16,990 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-11 19:44:16,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:16,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:16,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-11 19:44:16,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:17,130 INFO L124 PetriNetUnfolderBase]: 310/700 cut-off events. [2024-10-11 19:44:17,131 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2024-10-11 19:44:17,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1557 conditions, 700 events. 310/700 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3289 event pairs, 195 based on Foata normal form. 0/636 useless extension candidates. Maximal degree in co-relation 1480. Up to 462 conditions per place. [2024-10-11 19:44:17,134 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 62 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2024-10-11 19:44:17,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 72 transitions, 418 flow [2024-10-11 19:44:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:44:17,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:44:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-10-11 19:44:17,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5488372093023256 [2024-10-11 19:44:17,135 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 206 flow. Second operand 5 states and 118 transitions. [2024-10-11 19:44:17,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 72 transitions, 418 flow [2024-10-11 19:44:17,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 72 transitions, 370 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-10-11 19:44:17,137 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 184 flow [2024-10-11 19:44:17,137 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=65, PETRI_TRANSITIONS=48} [2024-10-11 19:44:17,138 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-10-11 19:44:17,138 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 184 flow [2024-10-11 19:44:17,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:17,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:17,138 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:44:17,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 19:44:17,138 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:44:17,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:17,139 INFO L85 PathProgramCache]: Analyzing trace with hash 913974706, now seen corresponding path program 1 times [2024-10-11 19:44:17,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:17,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090206960] [2024-10-11 19:44:17,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:17,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:44:17,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:17,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090206960] [2024-10-11 19:44:17,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090206960] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:44:17,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170376170] [2024-10-11 19:44:17,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:17,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:17,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:44:17,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:44:17,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 19:44:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:17,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 19:44:17,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:44:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:44:17,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:44:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:44:17,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170376170] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:44:17,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:44:17,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-11 19:44:17,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599713071] [2024-10-11 19:44:17,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:44:17,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:44:17,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:17,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:44:17,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:44:17,759 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-11 19:44:17,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 48 transitions, 184 flow. Second operand has 14 states, 14 states have (on average 16.0) internal successors, (224), 14 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:17,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:17,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-11 19:44:17,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:18,190 INFO L124 PetriNetUnfolderBase]: 548/1212 cut-off events. [2024-10-11 19:44:18,191 INFO L125 PetriNetUnfolderBase]: For 415/415 co-relation queries the response was YES. [2024-10-11 19:44:18,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2849 conditions, 1212 events. 548/1212 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 5479 event pairs, 143 based on Foata normal form. 98/1257 useless extension candidates. Maximal degree in co-relation 2793. Up to 350 conditions per place. [2024-10-11 19:44:18,196 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 141 selfloop transitions, 12 changer transitions 0/159 dead transitions. [2024-10-11 19:44:18,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 159 transitions, 848 flow [2024-10-11 19:44:18,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:44:18,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:44:18,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 289 transitions. [2024-10-11 19:44:18,197 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.560077519379845 [2024-10-11 19:44:18,197 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 184 flow. Second operand 12 states and 289 transitions. [2024-10-11 19:44:18,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 159 transitions, 848 flow [2024-10-11 19:44:18,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 159 transitions, 844 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:44:18,200 INFO L231 Difference]: Finished difference. Result has 80 places, 54 transitions, 259 flow [2024-10-11 19:44:18,201 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=259, PETRI_PLACES=80, PETRI_TRANSITIONS=54} [2024-10-11 19:44:18,201 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-10-11 19:44:18,201 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 54 transitions, 259 flow [2024-10-11 19:44:18,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.0) internal successors, (224), 14 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:18,201 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:18,202 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:44:18,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 19:44:18,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 19:44:18,406 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:44:18,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:18,406 INFO L85 PathProgramCache]: Analyzing trace with hash -955114265, now seen corresponding path program 1 times [2024-10-11 19:44:18,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:18,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583764841] [2024-10-11 19:44:18,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:18,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:44:18,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:18,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583764841] [2024-10-11 19:44:18,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583764841] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:44:18,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236917509] [2024-10-11 19:44:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:18,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:18,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:44:18,590 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:44:18,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 19:44:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:18,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 19:44:18,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:44:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:44:18,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:44:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:44:18,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236917509] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:44:18,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:44:18,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-11 19:44:18,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456671969] [2024-10-11 19:44:18,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:44:18,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:44:18,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:18,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:44:18,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:44:19,067 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-11 19:44:19,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 54 transitions, 259 flow. Second operand has 14 states, 14 states have (on average 16.0) internal successors, (224), 14 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:19,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:19,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-11 19:44:19,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:19,819 INFO L124 PetriNetUnfolderBase]: 1256/2732 cut-off events. [2024-10-11 19:44:19,819 INFO L125 PetriNetUnfolderBase]: For 2722/2722 co-relation queries the response was YES. [2024-10-11 19:44:19,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7165 conditions, 2732 events. 1256/2732 cut-off events. For 2722/2722 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 14955 event pairs, 150 based on Foata normal form. 266/2959 useless extension candidates. Maximal degree in co-relation 7102. Up to 470 conditions per place. [2024-10-11 19:44:19,831 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 265 selfloop transitions, 12 changer transitions 0/282 dead transitions. [2024-10-11 19:44:19,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 282 transitions, 1945 flow [2024-10-11 19:44:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:44:19,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:44:19,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 343 transitions. [2024-10-11 19:44:19,833 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6647286821705426 [2024-10-11 19:44:19,833 INFO L175 Difference]: Start difference. First operand has 80 places, 54 transitions, 259 flow. Second operand 12 states and 343 transitions. [2024-10-11 19:44:19,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 282 transitions, 1945 flow [2024-10-11 19:44:19,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 282 transitions, 1764 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-10-11 19:44:19,840 INFO L231 Difference]: Finished difference. Result has 94 places, 60 transitions, 319 flow [2024-10-11 19:44:19,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=319, PETRI_PLACES=94, PETRI_TRANSITIONS=60} [2024-10-11 19:44:19,841 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-10-11 19:44:19,842 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 60 transitions, 319 flow [2024-10-11 19:44:19,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.0) internal successors, (224), 14 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:19,842 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:19,842 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-10-11 19:44:19,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 19:44:20,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:20,047 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:44:20,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:20,047 INFO L85 PathProgramCache]: Analyzing trace with hash 231454915, now seen corresponding path program 2 times [2024-10-11 19:44:20,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:20,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144399282] [2024-10-11 19:44:20,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:20,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:44:20,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:20,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144399282] [2024-10-11 19:44:20,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144399282] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:44:20,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747568159] [2024-10-11 19:44:20,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:44:20,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:20,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:44:20,382 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:44:20,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 19:44:20,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:44:20,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:44:20,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-11 19:44:20,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:44:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:44:20,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:44:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 42 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:44:21,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747568159] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:44:21,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:44:21,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-10-11 19:44:21,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013098729] [2024-10-11 19:44:21,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:44:21,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 19:44:21,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:21,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 19:44:21,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2024-10-11 19:44:21,518 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-11 19:44:21,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 60 transitions, 319 flow. Second operand has 23 states, 23 states have (on average 17.17391304347826) internal successors, (395), 23 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:21,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:21,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-11 19:44:21,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:22,424 INFO L124 PetriNetUnfolderBase]: 1410/3098 cut-off events. [2024-10-11 19:44:22,424 INFO L125 PetriNetUnfolderBase]: For 4804/4804 co-relation queries the response was YES. [2024-10-11 19:44:22,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8907 conditions, 3098 events. 1410/3098 cut-off events. For 4804/4804 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 16931 event pairs, 6 based on Foata normal form. 96/3194 useless extension candidates. Maximal degree in co-relation 8836. Up to 480 conditions per place. [2024-10-11 19:44:22,444 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 264 selfloop transitions, 15 changer transitions 0/284 dead transitions. [2024-10-11 19:44:22,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 284 transitions, 2221 flow [2024-10-11 19:44:22,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 19:44:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-11 19:44:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 350 transitions. [2024-10-11 19:44:22,446 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2024-10-11 19:44:22,446 INFO L175 Difference]: Start difference. First operand has 94 places, 60 transitions, 319 flow. Second operand 15 states and 350 transitions. [2024-10-11 19:44:22,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 284 transitions, 2221 flow [2024-10-11 19:44:22,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 284 transitions, 1978 flow, removed 91 selfloop flow, removed 7 redundant places. [2024-10-11 19:44:22,457 INFO L231 Difference]: Finished difference. Result has 101 places, 61 transitions, 327 flow [2024-10-11 19:44:22,457 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=327, PETRI_PLACES=101, PETRI_TRANSITIONS=61} [2024-10-11 19:44:22,457 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-10-11 19:44:22,457 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 61 transitions, 327 flow [2024-10-11 19:44:22,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 17.17391304347826) internal successors, (395), 23 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:22,458 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:22,458 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-10-11 19:44:22,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 19:44:22,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 19:44:22,659 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:44:22,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:22,659 INFO L85 PathProgramCache]: Analyzing trace with hash -523930524, now seen corresponding path program 2 times [2024-10-11 19:44:22,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:22,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088485232] [2024-10-11 19:44:22,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:22,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:44:23,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:23,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088485232] [2024-10-11 19:44:23,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088485232] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:44:23,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554076602] [2024-10-11 19:44:23,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:44:23,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:23,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:44:23,105 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:44:23,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 19:44:23,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:44:23,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:44:23,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-11 19:44:23,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:44:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:44:23,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:44:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:44:24,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554076602] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:44:24,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:44:24,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2024-10-11 19:44:24,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723128518] [2024-10-11 19:44:24,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:44:24,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 19:44:24,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:24,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 19:44:24,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2024-10-11 19:44:24,299 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-11 19:44:24,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 61 transitions, 327 flow. Second operand has 25 states, 25 states have (on average 16.84) internal successors, (421), 25 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:24,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:24,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-11 19:44:24,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:26,313 INFO L124 PetriNetUnfolderBase]: 3038/6587 cut-off events. [2024-10-11 19:44:26,314 INFO L125 PetriNetUnfolderBase]: For 12640/12640 co-relation queries the response was YES. [2024-10-11 19:44:26,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18902 conditions, 6587 events. 3038/6587 cut-off events. For 12640/12640 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 39103 event pairs, 174 based on Foata normal form. 528/7115 useless extension candidates. Maximal degree in co-relation 18833. Up to 661 conditions per place. [2024-10-11 19:44:26,353 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 609 selfloop transitions, 24 changer transitions 0/637 dead transitions. [2024-10-11 19:44:26,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 637 transitions, 4638 flow [2024-10-11 19:44:26,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 19:44:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-11 19:44:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 705 transitions. [2024-10-11 19:44:26,356 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6831395348837209 [2024-10-11 19:44:26,356 INFO L175 Difference]: Start difference. First operand has 101 places, 61 transitions, 327 flow. Second operand 24 states and 705 transitions. [2024-10-11 19:44:26,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 637 transitions, 4638 flow [2024-10-11 19:44:26,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 637 transitions, 4108 flow, removed 66 selfloop flow, removed 10 redundant places. [2024-10-11 19:44:26,380 INFO L231 Difference]: Finished difference. Result has 127 places, 74 transitions, 477 flow [2024-10-11 19:44:26,381 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=477, PETRI_PLACES=127, PETRI_TRANSITIONS=74} [2024-10-11 19:44:26,381 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-10-11 19:44:26,381 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 74 transitions, 477 flow [2024-10-11 19:44:26,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 16.84) internal successors, (421), 25 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:26,382 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:26,382 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:44:26,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 19:44:26,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:26,587 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:44:26,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:26,587 INFO L85 PathProgramCache]: Analyzing trace with hash 959354701, now seen corresponding path program 1 times [2024-10-11 19:44:26,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:26,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336399191] [2024-10-11 19:44:26,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:26,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-10-11 19:44:26,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:26,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336399191] [2024-10-11 19:44:26,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336399191] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:44:26,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:44:26,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:44:26,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469864849] [2024-10-11 19:44:26,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:44:26,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:44:26,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:26,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:44:26,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:44:26,643 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-10-11 19:44:26,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 74 transitions, 477 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:26,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:26,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-10-11 19:44:26,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:27,418 INFO L124 PetriNetUnfolderBase]: 2994/6531 cut-off events. [2024-10-11 19:44:27,418 INFO L125 PetriNetUnfolderBase]: For 13150/13150 co-relation queries the response was YES. [2024-10-11 19:44:27,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20371 conditions, 6531 events. 2994/6531 cut-off events. For 13150/13150 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 39828 event pairs, 2881 based on Foata normal form. 68/6598 useless extension candidates. Maximal degree in co-relation 20289. Up to 5998 conditions per place. [2024-10-11 19:44:27,460 INFO L140 encePairwiseOnDemand]: 41/43 looper letters, 67 selfloop transitions, 1 changer transitions 1/73 dead transitions. [2024-10-11 19:44:27,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 73 transitions, 613 flow [2024-10-11 19:44:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:44:27,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:44:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-10-11 19:44:27,462 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-10-11 19:44:27,462 INFO L175 Difference]: Start difference. First operand has 127 places, 74 transitions, 477 flow. Second operand 3 states and 75 transitions. [2024-10-11 19:44:27,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 73 transitions, 613 flow [2024-10-11 19:44:27,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 73 transitions, 570 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-10-11 19:44:27,507 INFO L231 Difference]: Finished difference. Result has 119 places, 72 transitions, 412 flow [2024-10-11 19:44:27,508 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=119, PETRI_TRANSITIONS=72} [2024-10-11 19:44:27,508 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-10-11 19:44:27,508 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 72 transitions, 412 flow [2024-10-11 19:44:27,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:27,508 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:27,508 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2024-10-11 19:44:27,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 19:44:27,509 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:44:27,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:27,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2117355588, now seen corresponding path program 3 times [2024-10-11 19:44:27,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:27,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056099414] [2024-10-11 19:44:27,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:27,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 291 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:44:27,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:27,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056099414] [2024-10-11 19:44:27,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056099414] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:44:27,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782109073] [2024-10-11 19:44:27,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 19:44:27,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:27,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:44:27,856 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:44:27,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 19:44:27,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 19:44:27,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:44:27,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 19:44:27,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:44:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 64 proven. 30 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-10-11 19:44:28,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:44:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-10-11 19:44:28,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782109073] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:44:28,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:44:28,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 23 [2024-10-11 19:44:28,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774865473] [2024-10-11 19:44:28,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:44:28,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 19:44:28,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:28,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 19:44:28,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2024-10-11 19:44:29,103 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-11 19:44:29,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 72 transitions, 412 flow. Second operand has 23 states, 23 states have (on average 17.695652173913043) internal successors, (407), 23 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:29,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:29,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-11 19:44:29,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:31,351 INFO L124 PetriNetUnfolderBase]: 2686/5873 cut-off events. [2024-10-11 19:44:31,351 INFO L125 PetriNetUnfolderBase]: For 6812/6812 co-relation queries the response was YES. [2024-10-11 19:44:31,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16770 conditions, 5873 events. 2686/5873 cut-off events. For 6812/6812 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 34904 event pairs, 0 based on Foata normal form. 44/5917 useless extension candidates. Maximal degree in co-relation 16721. Up to 485 conditions per place. [2024-10-11 19:44:31,370 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 0 selfloop transitions, 0 changer transitions 653/653 dead transitions. [2024-10-11 19:44:31,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 653 transitions, 4255 flow [2024-10-11 19:44:31,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-11 19:44:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-10-11 19:44:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 713 transitions. [2024-10-11 19:44:31,372 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6632558139534884 [2024-10-11 19:44:31,372 INFO L175 Difference]: Start difference. First operand has 119 places, 72 transitions, 412 flow. Second operand 25 states and 713 transitions. [2024-10-11 19:44:31,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 653 transitions, 4255 flow [2024-10-11 19:44:31,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 653 transitions, 4175 flow, removed 6 selfloop flow, removed 24 redundant places. [2024-10-11 19:44:31,413 INFO L231 Difference]: Finished difference. Result has 116 places, 0 transitions, 0 flow [2024-10-11 19:44:31,413 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=0, PETRI_PLACES=116, PETRI_TRANSITIONS=0} [2024-10-11 19:44:31,413 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-10-11 19:44:31,414 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 0 transitions, 0 flow [2024-10-11 19:44:31,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 17.695652173913043) internal successors, (407), 23 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:31,416 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 18 remaining) [2024-10-11 19:44:31,416 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2024-10-11 19:44:31,416 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2024-10-11 19:44:31,417 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2024-10-11 19:44:31,417 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2024-10-11 19:44:31,417 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2024-10-11 19:44:31,417 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2024-10-11 19:44:31,417 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2024-10-11 19:44:31,417 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (9 of 18 remaining) [2024-10-11 19:44:31,417 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 18 remaining) [2024-10-11 19:44:31,417 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 18 remaining) [2024-10-11 19:44:31,417 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 18 remaining) [2024-10-11 19:44:31,417 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2024-10-11 19:44:31,418 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2024-10-11 19:44:31,418 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2024-10-11 19:44:31,418 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2024-10-11 19:44:31,418 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2024-10-11 19:44:31,418 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2024-10-11 19:44:31,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 19:44:31,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 19:44:31,619 INFO L407 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 1, 1, 1, 1] [2024-10-11 19:44:31,624 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-10-11 19:44:31,624 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-11 19:44:31,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 07:44:31 BasicIcfg [2024-10-11 19:44:31,627 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-11 19:44:31,628 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-11 19:44:31,629 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-11 19:44:31,629 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-11 19:44:31,629 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:44:14" (3/4) ... [2024-10-11 19:44:31,630 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-10-11 19:44:31,633 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2024-10-11 19:44:31,636 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 25 nodes and edges [2024-10-11 19:44:31,636 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2024-10-11 19:44:31,636 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-10-11 19:44:31,697 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-11 19:44:31,698 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/witness.yml [2024-10-11 19:44:31,698 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-11 19:44:31,698 INFO L158 Benchmark]: Toolchain (without parser) took 19094.93ms. Allocated memory was 174.1MB in the beginning and 889.2MB in the end (delta: 715.1MB). Free memory was 104.6MB in the beginning and 595.6MB in the end (delta: -491.0MB). Peak memory consumption was 224.9MB. Max. memory is 16.1GB. [2024-10-11 19:44:31,698 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 109.1MB. Free memory is still 71.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 19:44:31,698 INFO L158 Benchmark]: CACSL2BoogieTranslator took 858.45ms. Allocated memory is still 174.1MB. Free memory was 104.4MB in the beginning and 127.0MB in the end (delta: -22.5MB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. [2024-10-11 19:44:31,699 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.23ms. Allocated memory is still 174.1MB. Free memory was 127.0MB in the beginning and 124.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-11 19:44:31,699 INFO L158 Benchmark]: Boogie Preprocessor took 59.34ms. Allocated memory is still 174.1MB. Free memory was 124.9MB in the beginning and 122.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-11 19:44:31,699 INFO L158 Benchmark]: RCFGBuilder took 431.51ms. Allocated memory is still 174.1MB. Free memory was 122.1MB in the beginning and 96.9MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-10-11 19:44:31,699 INFO L158 Benchmark]: TraceAbstraction took 17616.89ms. Allocated memory was 174.1MB in the beginning and 889.2MB in the end (delta: 715.1MB). Free memory was 96.2MB in the beginning and 599.8MB in the end (delta: -503.6MB). Peak memory consumption was 532.4MB. Max. memory is 16.1GB. [2024-10-11 19:44:31,699 INFO L158 Benchmark]: Witness Printer took 69.86ms. Allocated memory is still 889.2MB. Free memory was 599.8MB in the beginning and 595.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-10-11 19:44:31,701 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 109.1MB. Free memory is still 71.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 858.45ms. Allocated memory is still 174.1MB. Free memory was 104.4MB in the beginning and 127.0MB in the end (delta: -22.5MB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.23ms. Allocated memory is still 174.1MB. Free memory was 127.0MB in the beginning and 124.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.34ms. Allocated memory is still 174.1MB. Free memory was 124.9MB in the beginning and 122.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 431.51ms. Allocated memory is still 174.1MB. Free memory was 122.1MB in the beginning and 96.9MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 17616.89ms. Allocated memory was 174.1MB in the beginning and 889.2MB in the end (delta: 715.1MB). Free memory was 96.2MB in the beginning and 599.8MB in the end (delta: -503.6MB). Peak memory consumption was 532.4MB. Max. memory is 16.1GB. * Witness Printer took 69.86ms. Allocated memory is still 889.2MB. Free memory was 599.8MB in the beginning and 595.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 931]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 55 locations, 18 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 17.5s, OverallIterations: 13, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 9.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2909 SdHoareTripleChecker+Valid, 4.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2759 mSDsluCounter, 715 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 680 mSDsCounter, 62 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8689 IncrementalHoareTripleChecker+Invalid, 8751 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 62 mSolverCounterUnsat, 35 mSDtfsCounter, 8689 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 627 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=477occurred in iteration=11, InterpolantAutomatonStates: 130, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 633 NumberOfCodeBlocks, 567 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 856 ConstructedInterpolants, 0 QuantifiedInterpolants, 9567 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1299 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 28 InterpolantComputations, 6 PerfectInterpolantSequences, 2005/2520 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-10-11 19:44:31,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE